Minimizing Canal Capacity for Irrigated Rice

by Ross E. Hagan, Research Assoc.; Dept. of Agr. Engrg., Univ. of Hawaii, Honolulu, Hawaii,
Jaw-Kai Wang, Prof.; Dept. of Agr. Engrg., Univ. of Hawaii, Honolulu, Hawaii,


Serial Information: Journal of the Irrigation and Drainage Division, 1977, Vol. 103, Issue 1, Pg. 71-78


Document Type: Journal Paper

Discussion: Wen Lin-jen (See full record)
Discussion: Wu Chian-Min (See full record)
Discussion: Schoemaker H. J. (See full record)
Closure: (See full record)

Abstract: Improved formulas are developed for calculating the maximum canal or pump capacity needed for lowland rice rotational irrigation system design. The conventional and modified conventional formulas are derived from assumptions that cannot be satisfied during irrigation system operation. This induces water usage and management inefficiencies into the system. Analysis of the conventional and modified conventional formulas with the rotational irrigation system management practices isolates several criteria to be used in integrating design and operation. By this integration, irrigation system efficiency is increased. The maximum capacity given by the improved formulas is smaller than that required by the conventional and modified conventional formulas. This allows the use of smaller canals or an enlargement of the area, or both, serviced by a given water supply flow rate.

Subject Headings: Irrigation systems | Canals | Crops | Rotation | Hydraulic design | Systems management | Pumps | Water use

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